{"product_id":"3-8-in-x-2-1-2-in-black-carriage-bolt-kit-ceramic-rust-protection","title":"3\/8 in x 2-1\/2 in Black Carriage Bolt Kit - Ceramic Rust Protection","description":"\u003cp\u003eIn this review of the 3\/8 in x 2-1\/2 in Black Carriage Bolt Kit the bottom line is simple: this kit is aimed at DIYers and contractors who need a clean, semi-flush fastening for outdoor timber builds and want better-than-galvanized corrosion protection. The reviewer found the five-layer ceramic black ruspert coating notable for appearance and intended rust resistance, and the included USS washers and hex nuts make the kit ready for immediate use. If your project is a deck, gazebo, pergola or light structural fastening where a tidy, smooth finish matters, this kit delivers.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete kit:\u003c\/strong\u003e Includes 25 carriage bolts, 25 USS thick washers and 25 hex nuts so projects can start without sourcing extra hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable size:\u003c\/strong\u003e 3\/8 in diameter and 2-1\/2 in length give a common, versatile fastener for decking and framing tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSemi-flush finish:\u003c\/strong\u003e The flat carriage head provides a tidy, partially recessed look that reduces snags and improves aesthetics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCeramic coating:\u003c\/strong\u003e Five-layer black ruspert finish offers improved rust resistance compared to galvanized fasteners, helping outdoor installations look better longer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade hardware:\u003c\/strong\u003e Grade 307A carriage bolts paired with grade 2 hex nuts and USS flat washers for dependable basic strength in typical exterior uses.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis kit is best for homeowners, woodworkers and light contractors fitting decks, pergolas, gazebos, pavilions or other outdoor structures where appearance and corrosion resistance matter. It is particularly useful when a semi-flush carriage head is preferred over exposed hex heads.\u003c\/p\u003e\u003cp\u003eThose needing heavy structural or engineered fasteners for load-bearing connections should consult structural fastener specifications; this kit is intended for common exterior fastening rather than critical structural applications that require higher-grade bolts or engineered hardware.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGood value as a ready-to-use 25-pack with matching washers and nuts included.\u003c\/li\u003e\n\u003cli\u003eAttractive black finish gives a uniform, low-profile look on outdoor timber projects.\u003c\/li\u003e\n\u003cli\u003eFive-layer ceramic ruspert coating provides increased rust resistance versus standard galvanized bolts.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eSome customers report mixed results on long-term rust resistance, so performance can vary with exposure and installation conditions.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e3\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e2-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead diameter\u003c\/td\u003e\n\u003ctd\u003e0.813 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNut wrench size\u003c\/td\u003e\n\u003ctd\u003e9\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWasher outside diameter\u003c\/td\u003e\n\u003ctd\u003e1 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003e5-layer ceramic black ruspert\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded hardware\u003c\/td\u003e\n\u003ctd\u003e25 carriage bolts, 25 USS thick washers, 25 hex nuts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe 3\/8 in x 2-1\/2 in Black Carriage Bolt Kit is a practical choice for outdoor wood projects where a neat semi-flush head and improved corrosion protection are priorities. It offers good value with a complete set of washers and nuts and an attractive black finish; buyers should be aware that extreme environments may still require higher corrosion ratings.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAre the nuts and washers included?\u003c\/strong\u003e\u003cbr\u003eYes, the kit includes 25 hex nuts and 25 USS thick flat washers along with the 25 carriage bolts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat wrench size fits the nut?\u003c\/strong\u003e\u003cbr\u003eThe hex nut uses a 9\/16 in wrench.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much better is the coating than galvanized?\u003c\/strong\u003e\u003cbr\u003eThe five-layer ceramic black ruspert coating is described as providing about 2X rust resistance compared to galvanized finishes, though real-world performance depends on exposure.\u003c\/p\u003e","brand":"Makers Bolt","offers":[{"title":"Default Title","offer_id":48669253730523,"sku":"B0DH75F461","price":33.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61y8SICHafL._SL1500_38ed2d43-fa93-4b1d-90f3-8ebf6df0db3d.jpg?v=1778646118","url":"https:\/\/gearmusthave.com\/products\/3-8-in-x-2-1-2-in-black-carriage-bolt-kit-ceramic-rust-protection","provider":"GearMustHave","version":"1.0","type":"link"}